Purple potato crystal moon cake。好吃不上火的紫薯水晶月餅，無需烤箱，軟糯香甜，超級好吃！

主要食材：澄粉60克，沸水60克，紫薯200克，白糖20克。豆沙餡500克。
白色麵糰食材：糯米粉100克，牛奶80克，植物油15克。
淺紫色食材：糯米粉100克，紫薯泥50克，牛奶70克，植物油15克。
深紫色食材：糯米粉100克，紫薯泥150克，牛奶50克，植物油15克。
Main ingredients: 60g wheat starch, 60g boiling water, 200g purple potato and 20g white sugar. 500g bean paste filling.
Ingredients for white dough: 100g glutinous rice flour, 80g milk and 15g vegetable oil.
Light purple ingredients: 100g glutinous rice powder, 50g purple potato mud, 70g milk and 15g vegetable oil.
Dark purple ingredients: 100g glutinous rice powder, 150g purple potato mud, 50g milk and 15g vegetable oil.